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ASTM B581-02(2008)

ASTM B581-02(2008) Standard Specification for Nickel-Chromium-Iron-Molybdenum-Copper Alloy Rod

standard by ASTM International, 11/01/2008

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1.1 This specification covers rod of Ni-Cr-Fe-Mo-Cu alloys (UNS N06007, N06975, N06985, N06030, and N08031)* as shown in Tables 1-2, for use in general corrosive service.

1.2 The following products are covered under this specification:

1.2.1 Rods 5/16 to in. (7.94 to 19.05 mm) excl in diameter, hot- or cold-finished, solution annealed and pickled or mechanically descaled.

1.2.2 Rods to 3 in. (19.05 to 88.9 mm) incl in diameter, hot- or cold-finished, solution annealed, ground or turned.

1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.

TABLE 1 Chemical Requirements

ElementComposition Limits, %
Alloy N06007Alloy N06975Alloy N06985Alloy N06030Alloy N08031
Nickel remainderA47.0-52.0remainderAremainderA30.0-32.0
Chromium 21.0-23.5 23.0-26.0 21.0-23.5 28.0-31.526.0-28.0
Iron 18.0-21.0remainderA18.0-21.013.0-17.0remainderA
Molybdenum5.5-7.5 5.0-7.0 6.0-8.0 4.0-6.030.-7.0
Copper 1.5-2.5 0.70-1.20 1.5-2.5 1.0-2.41.0-1.4
Manganese 1.0-2.0 1.0 max 1.0 max 1.5 max2.0 max
Cobalt, max2.5... 5.0 max 5.0 max...
Carbon, max0.050.030.015 max 0.03 max0.015
Tungsten 1.0 max... 1.5 max 1.5-4.0...
Silicon, max1.0 1.0 1.0 max 0.8 max0.3
Phosphorus, max 0.04 0.03 0.04 max 0.04 max0.020
Sulfur, max 0.03 0.03 0.03 max 0.02 max0.010
Columbium + tantalum 1.75-2.50 ... 0.50 max 0.30-1.50...
Titanium ... 0.7-1.5... ......
Nitrogen0.15-0.25............

A See 13.1.1.

TABLE 2 Permissible Variations in Diameter and Out-of-Roundness of Rods

Specified Diameter, in. (mm) Permissible Variations, in. (mm)
Diameter Out-of-Roundness, max
+
Hot-Finished, Annealed, and Descaled Rods
5/16 to 7/16 (7.94 to 11.11), incl0.012 (0.305)0.012 (0.305)0.018 (0.457)
Over 7/16 to 5/8(11.11 to 15.87), incl 0.014 (0.355)0.014 (0.355)0.020 (0.508)
Over 5/8 to (15.87 to 19.05), excl0.016 (0.406)0.016 (0.406)0.024 (0.610)
Hot-Finished, Annealed, and Ground or Turned Rods
to 3 (19.05 to 88.9), incl0.010 (0.254)00.008 (0.203)

 
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